Eavesdroppers above (the bounty hunter) and below (River) |
On Whedon's DVD commentary track for this episode - one of the few DVD commentaries I've ever listened to more than once, and one I recommend if you care about the show and somehow haven't heard it yet - he talks about how the episode's roots were born in his teenage crisis of faith and discovery of existentialism, and the idea of morality in a world without God, which he previously summed up in a line from "Angel": "If nothing we do matters, then all that matters is what we do."